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Original appearance analysis method of inclusions in electrolytic separation non-aluminum weakly deoxidized bearing steel

A technology of weakly deoxidized bearing and analysis method, which is applied in the field of original appearance analysis of inclusions in electrolytically separated non-aluminum weakly deoxidized bearing steel, can solve the problems of inability to optimize the production process and affect the observation of the three-dimensional original appearance of inclusions, and achieve three-dimensional appearance. Maintain integrity, precise separation and high extraction rate

Active Publication Date: 2022-03-01
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When studying the influence of inclusions in non-aluminum weakly deoxidized bearing steel, when the original appearance of the inclusions in the steel was analyzed by means of electrolysis, it was found that the aggregation of small particles of silicate inclusions was obvious and adhered to each other, which seriously affected the inclusions. Observation of the original three-dimensional appearance of the object makes it impossible to accurately optimize the production process

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  • Original appearance analysis method of inclusions in electrolytic separation non-aluminum weakly deoxidized bearing steel
  • Original appearance analysis method of inclusions in electrolytic separation non-aluminum weakly deoxidized bearing steel
  • Original appearance analysis method of inclusions in electrolytic separation non-aluminum weakly deoxidized bearing steel

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Embodiment 1

[0033] A method for analyzing the original appearance of inclusions in non-aluminum weakly deoxidized bearing steel by electrolysis, comprising the following steps:

[0034] (1) Sampling and processing the steel sample to be tested into a round bar-shaped electrolytic sample, the diameter of the electrolytic sample is φ20mm, the length is 50mm, and the surface is polished with sandpaper to remove the surface oxide layer, and then cleaned with acetone to remove oil stains;

[0035] (2) Seal the upper end of the round rod-shaped electrolytic sample with insulating tape, connect the positive pole of the DC power supply through a metal wire, and heat-seal the lower end with wax within 10mm to isolate the electrolyte, leaving only the middle cylinder exposed, and immerse it in the electrolyte. The solvent of 90vol% anhydrous methanol-5vol% glycerol-5vol% triethanolamine is mixed with tetramethylammonium chloride and 200mg / L acrylate copolymer of the total mass of the solvent;

[00...

Embodiment 2

[0040] A method for analyzing the original appearance of inclusions in non-aluminum weakly deoxidized bearing steel by electrolysis, comprising the following steps:

[0041] (1) Sampling and processing the steel sample to be tested into a round bar-shaped electrolytic sample, the diameter of the electrolytic sample is φ20mm, the length is 50mm, and the surface is polished with sandpaper to remove the surface oxide layer, and then cleaned with acetone to remove oil stains;

[0042] (2) Seal the upper end of the round rod-shaped electrolytic sample with insulating tape, connect the positive pole of the DC power supply through a metal wire, and heat-seal the lower end with wax within 10mm to isolate the electrolyte, leaving only the middle cylinder exposed, and immerse it in the electrolyte. A solvent of 85vol% anhydrous methanol-5vol% glycerin-10vol% triethanolamine, with tetramethylammonium chloride and 150mg / L acrylate copolymer of the total mass of solvent added;

[0043] (3)...

Embodiment 3

[0047] A method for analyzing the original appearance of inclusions in non-aluminum weakly deoxidized bearing steel by electrolysis, comprising the following steps:

[0048] (1) Sampling and processing the steel sample to be tested into a round bar-shaped electrolytic sample, the diameter of the electrolytic sample is φ20mm, the length is 50mm, and the surface is polished with sandpaper to remove the surface oxide layer, and then cleaned with acetone to remove oil stains;

[0049] (2) Seal the upper end of the round rod-shaped electrolytic sample with insulating tape, connect the positive pole of the DC power supply through a metal wire, and heat-seal the lower end with wax within 10mm to isolate the electrolyte, leaving only the middle cylinder exposed, and immerse it in the electrolyte. The solvent of 88vol% anhydrous methanol-6vol% glycerin-6vol% triethanolamine, the tetramethylammonium chloride of adding solvent gross mass 1wt% and the acrylate copolymer of 100mg / L;

[005...

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Abstract

According to the original appearance analysis method for electrolytic separation of the inclusions in the non-aluminum weakly deoxidized bearing steel, through treatment of the electrolytic position of the electrolytic sample and adjustment of technological parameters of electrolysis, precise separation of the inclusions in the non-aluminum weakly deoxidized bearing steel is achieved, adhesion to a base material is avoided, the extraction rate is high, and the three-dimensional appearance is kept complete. According to the method, the acrylate copolymer is added into the electrolyte in the electrolysis process, the sodium acrylate and acrylamide copolymer is added into the filtrate during suction filtration, and the silicate inclusions which are good in three-dimensional morphology and not agglomerated are obtained through separation by controlling the concentration and the suction rate of the filtrate through three-stage suction filtration; and a basis is provided for precise optimization of a production process.

Description

technical field [0001] The invention belongs to the field of analysis and detection of inclusions in steel, and in particular relates to an original appearance analysis method for electrolytic separation of inclusions in non-aluminum weakly deoxidized bearing steel. Background technique [0002] With the development of various high-tech industries in our country, such as aerospace, high-speed railway, etc., the quality requirements of the required bearing steel are also getting higher and higher. Taking high-speed rail as an example, the bearings used in high-speed rail above 300km / h are still completely dependent on imports. Although the domestic production of bearing steel is large, the quality cannot meet the high requirements. Further optimization of the domestic bearing steel production process is needed. [0003] An important factor affecting the quality of bearing steel is inclusions in the steel. Therefore, it is very important for the metallurgical industry to prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/2202G01N23/2251G01N23/2206
CPCG01N23/2202G01N23/2251G01N23/2206
Inventor 顾超吕子宇包燕平
Owner UNIV OF SCI & TECH BEIJING